Refractory Silica Bricks For Hot Blast Furnace

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Shanghai
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Min Order Qty:
15 m.t.
Supply Capability:
30000 m.t./month

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General Information

CMAX silica brick using high quality silica as raw material to ensure superior performance of silica bricks, the raw materials is high quality dinas rock with SiO2 of 99% min. Its unique structure helps ease forming. Moreover, advantages of complete transformation after sintering and lower residual quartz enable to produce super-duty silica bricks.    

 

Performance:

The silica bricks for glass furnace is characterized by high purity, less impurity, good corrosion resistance, higher bulk density, complete phase transformation, lower residual quartz, high RUL, lower thermal expansion and stable volume at high temperature.

Application
CMAX Silica bricks are commonly applied in

Coke oven

Hot blast stoves

Glass furnace


Technical Data

  ITEM

For Hot-Blast Stoves

                   For Glass Furnace

  S-94

S-95

  S-95B

  G-94

  G-95A

  G-95B

  G-96A

  G-96B

  SiO2, %

  ≥ 94

  ≥ 95

  ≥ 95

  ≥ 94

  ≥ 95

  ≥ 95

  ≥ 96

  ≥ 96

  Fe2O3, %

  ≤ 1.5

  ≤ 0.5

  ≤ 1

  ≤ 1.5

  ≤ 1.2

  ≤ 1.2

  ≤ 0.8

  ≤ 1

  Residual Quartz, %

  ≤ 1

  ≤ 1

  ≤ 1

  ≤ 1

  Apparent Porosity

  ≤ 23

  ≤ 23(24)

  ≤ 21(23)

  ≤ 24

  ≤ 22(24)

  ≤ 22(24)

  ≤ 22(24)

  ≤ 22(24)

  True Density, g/cm 3

≤ 2.35

  ≤ 2.34

  ≤ 2.33

  ≤ 2.35

  ≤ 2.35

  ≤ 2.34

  ≤ 2.34

  Cold Crushing Strength, Mpa

  ≥ 29.4

  ≥ 30(27)

  ≥ 30(20)

  ≥ 30

  ≥ 30(35)

  ≥ 30(35)

  ≥ 30(35)

  ≥ 30(35)

  Refractoriness Under Load, º C

  ≥ 1650

  ≥ 1600

≥ 1630 

  ≥ 1660

  ≥ 1650

  ≥ 1680

  ≥ 1670

  Permanent Linear Change, %

  1500º CX4h, ± 0.2

  1450º CX2h, ± 0.5

 Refractory Silica Bricks For Hot Blast Furnace


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Q:Can iron oxide be used as refractory material?
Is widely used in this area. Mentioned refractory material of high school textbooks generally refers to three two aluminum oxide (alumina), alumina is also used as a refractory material, refractory crucible, porcelain, artificial gemstones.
Q:Common bond brick?
Lime should contain a lot of active CaO, I decompose CaCO3 and MgCO3 not more than 5%, Al2O3+Fe2O3+SiO2 no more than 5%. When the content of large particles, burned Ca-CO3 and over burned lime, the product produced caves, affecting the quality of products.
Q:Why in the production of the brick to detect the volume density
Density is the property of material, different density of materials, density of the same kind of material is not up to standard, affecting performance.
Q:What are the materials for refractory materials? What are their names?
Acidic materialMainly siliceous materials, such as quartz, tridymite and cristobalite, chalcedony, flint, opal, white quartzite, silica sand, diatomaceous earth, silicon oxide contained in these siliceous materials (SiO2) at least 90%, pure raw materials are silicon oxide as high as 99% or more. Siliceous materials at high temperature is the acidic nature of chemical dynamics, when the presence of metal oxide, or when in contact with the chemical reaction, and combined with a fusible silicate. Therefore, if there is a small amount of metal oxide in siliceous material, it will seriously affect its thermal resistance.
Q:The difference between clay refractory bricks and refractory brick in the application.
Brick bearing soft temperature and close to the melting point, high temperature strength, can be in high temperature (above 1400 degrees) under the condition of long-term use, but the anti alkali erosion ability, thermal shock stability is the worst, a scrap. The brick is generally used in the coke oven, glass kiln. Other industries basically do not use.
Q:How much is the highest melting point of silicon?
. True density 2.35g/cm3. With acid resistance, slag erosion performance. Higher high temperature strength. The softening start temperature is 1620~1670 degrees. Long term use at high temperature without deformation. The thermal shock resistance is low (the heat exchange in water is 1~4 times). The natural silica is used as the raw material, and a proper amount of mineralizer is used to promote the transformation of quartz into quartz in the body. Slowly sintered at 1350~1430 DEG C in the reducing atmosphere. The total volume of heating to 1450 DEG about 1.5~2.2% expansion, the residual expansion will make cutting seam sealing, ensure masonry tightness and good structure strength, so that the brick load softening temperature will reach 1750 degrees Celsius above 1620 degrees in the case of the highest melting point.
Q:Semisilica brick, clay brick, high alumina brick and what is the difference?
This is a kind of refractory material is divided into three types: semisilica brick (A12O315 ~ 30%), clay brick (A12O330 ~ 48%), high aluminum brick (A12O3>48%).
Q:Which material is good for furnace refractory?
Neutral refractory is mainly composed of alumina, chromium oxide or carbon. Corundum products containing more than 95% of alumina are a kind of high quality refractory materials with a wide range of uses. Chrome brick with chromium oxide as its main component has good corrosion resistance, but its thermal shock resistance is poor, and its deformation temperature is lower at high temperature. Carbon refractories with carbon bricks, graphite and silicon carbide products, low coefficient of thermal expansion, high thermal conductivity, good thermal shock resistance, high strength, resistance to acid and salt corrosion, especially weak acid has good resistance, without wetting of the metal and slag, light. It is widely used as lining material of high temperature, and also used as lining of autoclave in petroleum and chemical industry.
Q:The formula in the refractory brick, and firing curve, who knows?
Iron scale powder 0.45-0.55%, cement 0.9-1.1%, lime milk 6.5-7.5%, pulp 1.95-2.2%, the silica powder, perlite will be added to the wet mill in proportion, and then add iron scale powder, cement, dry roller 1-2 minutes later
Q:What role does silica play in refractories?
The production of clay brick refractory clay raw material is natural, its main mineral is kaolinite (formula Al2O3 - 2SiO2 - 2H2O), clay brick containing SiO2 in 45% ~ 65%, belongs to the weak acid refractory materials, have a certain ability to resist acid slag, but easy to be alkaline slag erosion.

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